Often I need to copy a detail, shape or an entire Building floor plan to a new layer as base for the further designing.Yes, there is a possibility to do that in QCAD but it's still a kind of workaround.

However ... if I see how easy it already is to select something and move it in the Property Editor to a different or new layer then I like to have an additional option what could be called:"Copy Selection to a New Layer".Maybe placed to the right of the "+" / "Move Selection to a New Layer"

I usually do:Make a selectionCopy/MovePoint to reference, say point x,yPoint to Target, same point x,yKeep Original (now the copy is selected)Change the Layer in the property EditorDoneThis will keep all the specific properties too.